deps: update to confluent-kafka 2.13.0

[amotl]

About

Permit installation on Python 3.14 without needing a compiler toolchain.

Problem

      fatal error: librdkafka/rdkafka.h: No such file or directory
         23 | #include <librdkafka/rdkafka.h>
            |          ^~~~~~~~~~~~~~~~~~~~~~
      compilation terminated.
      error: command '/usr/bin/gcc' failed with exit code 1

References

• CI: Use more Python 3.14 (next) crate/cratedb-toolkit#592 (CI failure)